/**
 * Copyright(c)2012 Beijing PeaceMap Co.,Ltd.
 * All right reserved. 
 */
package com.pmc.dwa.security.intercept;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

/**
 * @description 一个自定义的filter，
 * 	必须包含authenticationManager,accessDecisionManager,securityMetadataSource三个属性，
    	我们的所有控制将在这三个类中实现
 * @author aokunsang
 * @date 2013-1-6
 */
public class PmcFilterSecurityInterceptor extends AbstractSecurityInterceptor
		implements Filter {


	private FilterInvocationSecurityMetadataSource fisMetadataSource;

	@Override
	public Class<?> getSecureObjectClass() {
		return FilterInvocation.class;
	}

	@Override
	public SecurityMetadataSource obtainSecurityMetadataSource() {
		return fisMetadataSource;
	}

	@Override
	public void destroy() { }

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		FilterInvocation fi = new FilterInvocation(request, response, chain);
		InterceptorStatusToken token = super.beforeInvocation(fi);
		try {
			fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			super.afterInvocation(token,null);
		}
	}

	@Override
	public void init(FilterConfig config) throws ServletException {

	}

	/**
	 * @param fisMetadataSource the fisMetadataSource to set
	 */
	public void setFisMetadataSource(
			FilterInvocationSecurityMetadataSource fisMetadataSource) {
		this.fisMetadataSource = fisMetadataSource;
	}
}
